I'm on a student plan trying to purchase additional substance painter textures

I recently switched from my personal plan to a school one provided for me that includes most apps. I'm working on a project in UE5 and Substance and there are a lot of textures I would like to use from the paid plans but I don't have an option to even purchase a different plan anymore to access the premium assets. How can I access the paid textures? Is there any way to purchase a-la-carte or supliment my school's plan? If I make another personal account it'll sign me out and my projects will be messed up.